ABOUT HUMAN BODY

                         ABOUT HUMAN BODY

---GOOSE BUMPS EVOLVED TO MAKE OUR ANCESTORS HAIR STAND UP .,MAKING THEM APPEAR MORE THREATENING TO PREDATORS .

   IF THEY WERE LAID END TO END ,ALL OF THE BLOODVESSELS IN THE HUMAN BODY WOULD ENCIRCLE THE EARTH FOUR TIMES .

AS YOU BREATHE ,MOST OF THE AIR IS GOING IN AND OUT OF ONE NOSTRIL .EVERY FEW HOURS,THE WORKLOAD SHIFTS TO THE OTHER NOSTRIL .

   BLOOD MAKES UP ABOUT 8 PERCENT OF YOUR TOTAL BODY WEIGHT .

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                                                                                                 YOU HAVE TWO KIDNEYS ,BUT ONLY ONE IS NECESSARY TO LIVE .

BELLY BUTTONS GROW SPECIAL HAIRS TO CATCH LINT .

THE SATISFYING SOUND OF CRACKING YOUR KNUEKLES COMES FROM GAS BUBBLES BURSTING INYOUR JOINTS.   

SKIN IS THE BODY'SLARGEST ORGAN AND CAN COMPRISE 15 PERCENT OF A PERSON ' S TOTAL WEIGHT.

 THUMBS  HAVE   THEIR   OWN   PULSE. YOUR  TONGUE IS MADE  UP  OF EIGHT INTERWOVEN  MUSCLES, SIMILAR IN STRUCTURE  TO AN ELEPHANT'S TRUNK OR AN OCTOPUS' S  TENTACLE. 

ON A GENETIC LEVEL, ALL HUMAN  BEINGS  ARE  MORE  THAN  99  PERCENT  IDENTICAL. 

THE FOOT IS ONE OF THE MOST TICKLISH PARTS OF THE BODY. 

A  SURGICAL PROCEDURE CALLED A SELECTIVE  AMYGDALOOHIPOCAM REMOVES HALF OF THE BRAIN'S AMYGDALA.